Evaluation of Regional Variability and Measurement Reproducibility of Intravoxel Incoherent Motion Diffusion Weighted Imaging Using a Cardiac Stationary Phase Based ECG Trigger Method

Figure 2

Comparison of free-breathing (FB) and CaspECG techniques on DWI data from a healthy 22-year-old man. DWI data with = 0 (a, d) and 600 (b, e) sec/mm² were shown and compared ((a, b, c) FB method, (d, e, f) CaspECG metod). The signal decay and biexponential fitting curves were also shown (c, f). The blue circles in (a, d) and red snowflakes (b, e) denote right and left hepatic lobes, respectively. In DWI data at = 600 sec/mm² (b), significant signal loss was found in the left hepatic lobe (arrows) for FB method, but not for CaspECG method, which influenced the following IVIM fitting (c).